Method of securing diamonds in stone-cutting tools



(No Model.) r 1 v R. MARQUART. METHOD OF. SEGURINGDIAMONDS IN STONE UUT TING TOOLS.

No; 531,051. Patented Dec. 18, 1894.

' "UNITED S A ES PATIENT. OFFICE.

RUDOLF' MARQUARQDF HNEW YORK, N. ASSIGNOR TO HIMSELF AND CHARLES BRANDT,'JB., or SAME PLACE, AND EDWARD B. TOMPKINS,

OF BROOKLY-Ji, NEW YORK;

I METHOD OF- S E C UI-RIiN-G DIAMONDS'I'N 'sToN E-oU TTiNcooLs;

'sPEcmIcanonr i part 'ofLetters' Paren No. '53'1,051, dated December 18,1894. f Pr l =rt onfi1eartugusr3.1894 serml 'amasia rNospecimens-l To aZZ-ivhom it mag concern.- V v Be it knownthat I, RUDOLF MARQUARL-a sub ect'of the Emperori of Germany, residin g in the city,county,' and State of New York,

have invented a new and 'useful'lmprovement 11 1 9 l \/lethod-of Securing Diamonds and other Stones in Implements for Cutting Stone, of which'the followingjisa-specification.

boring stone, where diamonds orsirnilar hard substances are employed for efiecting the cutting or abraslon of the stone, it is very neces;

sary that said diamondsbe'securely.held in" 1 said implements so that they cannot readily become detached, the usual method of (pressin g around the stone's, the metal of. the implement or of a' cup to fit therein,"being .inefficient as'the stones readily work out of the settingxl.

' m I will herein describe the. method as pur- I sued by me in securingdiamonds, particularly in teeth for diamond toothed saws for sawing stone, the same method being equally applicable to the'setting of diamonds in'other implements for working stone.

stone, thestone is placed in said receptacle which .receives almost the entire stone.

heat while the stone is thus held, and a brazing. metal or hard solder is poured over the parts and enters and fills the interstices be:

tween the metal andthe stone to the surface of the metal. H The hot metal'and brazing metal unite and while'in this heated condition .are subjected to an external, pressing action cation of like date herewith.

to consolidate the metals around the stone, which when the metal cools and. contracts is held in place exceedingly secure and firm." This pressing'action may be accomplished inany desired manner and by any desired instrumentality. I however prefer a pressing instrument shown and described in an appli The surface stone above the surface of the metal, or inadshowing the diamond inserted-to place. In saws or other 1mplementsforfdressing or The metal is then heated quitehot or to a dull red dition thereto a face at one edge of the metal,

so that the'diamond will cut at the side and alsoat the edge.

elevation a piece'of metal having a cavity or receptacle Fig. 2 is a 'cross se'ctionof the same and Fig. 3 is a similar-cross section Fig. 4 represents by an elevation the piece" of 'metal-as holding and securing thediamond by the edges of the metal being pressed over onto the stone. Fig.5 is a cross section of the parts, in Fig. 4 showing the bra-zinger solder and stone.

metal I) composing-theftooth or cutting blade or other device by a drill or in any desired manner by suitable tools. ceptacleis made of a size to receive thediamond to be' secured therein and said cavity receives and may approximately conform may be vmade around the edge of the cavity if desired. The diamond is forced into the In carrying out my invention 1 form a cavity or receptacle in apiece of steel orother metal: 'to receive the diamond or similar cuttingca'vity andthe same receives almost the entire stone. 7 The piece of metal with the stone in place is then heated quite hot or to a dull red heat, and while in this condition a molten brazing metal or hardsolder is poured .over.

thelstone and flows into and fills the inter,- stices between the metal and the stone and unites with the hot metal. This filling metal is shownat d, Fig. 5.- While-in this condition the hot metal such as brazing metal or solder is thoroughly pressed from without around ing held rigidly in place. is then shaped for the purpose for which it is intended, the. surface, at the cutting face of the stone being filed off to make it level and true and to more perfectly expose the cutting face of the stone, and when desired the edge In: the drawings, Figure l represents by an tillingtheinterstices between the metal body I t 5 v. The cavity 'or' receptacle Va is made in the thereto and in making the cavitya slight wall- The cavity or reand over upon the stone so as to insure filling tract around the stone,insuring the stone be- The piece of metal 5 is also filed ofi": on the line 1 ,y of Figs. 4 and 5 to expose one edge of the stone for service.

It will be observed that because of the general rotundity of the uncut diamond there is a body of metal bearing against its surface between the central line of the stone and the exposed point that forms segments of an arch over the stone tending to hold the stone rigidly in place and effectually preventing the same being worked out of its setting.

I claim as my invention- 1. The method herein specified of securing diamonds and other stones in implements for cutting stone, the same consisting in making a cavity or receptacle in a piece of metal, inserting the diamond into the cavity, heating the metal with the stone in place and filling in the interstices around the stone with a molten brazng metal or solder which unites with the metal and then pressing and forcing the hot metal and brazing metal from with- -out around-and over upon the stone to se curely hold the same in place, substantially as specified.

2. The method herein specified of securing diamonds and other stones in implements for cutting stone, the same consisting in making a cavity or receptacle in a piece of metal, in-

sertiug the diamond into the cavity, heating the metal with the stone in place and filling in the interstices around thestone with a molten brazing metal or solder which unites with the metal and then pressing and forcing the hot metaland brazing metal from without around and over, upon the stone to securely hold the same in place, and filing oil. or otherwise finishing one or more surfaces of the metal around and adjacent to the stone for more elfectually exposing the surface of the stone for cutting, substantially as set forth.

3. The method herein specified of securing diamonds and other stones in implements for cutting stone, the same consisting in making a cavity or receptacle in a piece of metal, inserting the diamond into the cavity, heating the metal with the stone in place and filling in the interstices around the stone with a molten brazing-metal or solder which unites with the metal, substantially as specified.

Signed by me this 18th day of July, A. D.

RUDOLF MARQUART. Witnesses:

Gno. T. PINCKNEY, HAROLD SERRELL. 

